US Highway 101 SB over 101 NB - 1 SB Connector
San Francisco County, California · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US Highway 101 SB over 101 NB - 1 SB Connector in San Francisco County, California, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2011, making it 14 years old at the 2025 inventory.
- It carries about 39,500 vehicles a day (traffic count year 2015).
- Its listed owner is the state highway agency.
- It is one of 48 of the 144 inventoried bridges in San Francisco County rated good (33.3%); 20 (13.9%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (37.80347, -122.47082)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Concrete slab |
| Length | about 43 ft |
| Location | 04-sf-101-r9.58-sf |
| NBI structure number | 34 0155L |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in San Francisco County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 80 over Gate San Francisco Bay | 2013 | 265,000 | Good |
| St Rte 101 (5TH St over Bayshore Viaduct | 1955 | 256,700 | Fair |
| Interstate 80 over Yerba Buena Island | 1936 | 248,000 | Good |
| Interstate 80 over Yerba Buena Island | 2007 | 248,000 | Good |
| U.S. Highway 101 over 280/101 Ic - Alemany Cir | 1950 | 234,000 | Fair |
| U.S. Highway 101 over Cesar Chavez Blvd | 1951 | 234,000 | Poor |
All bridges nearby: San Francisco County, CA bridge conditions · every bridge in San Francisco County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.